python manage.py db init
python manage.py db migrate
python manage.py db upgrade
首次生成执行三条命令之后更新数据库只需要执行后两条命令
# manage.py
from flask_script import Manager
from flask_migrate import Migrate, MigrateCommand
from flask_问答平台 import app
from exts import db
manager = Manager(app)
migrate = Migrate(app, db)
manager.add_command('db', MigrateCommand)
if __name__ == '__main__':
manager.run()